^Any more? =P
KAM was the hands-down best GBA Kirby game, and perhaps the best "modern gen" handheld Kirby (even better than KSSU, which is epic in itself).
The map was grand, luscious and full of devices that perhaps were a little annoying for the general Kirby fandom (i.e giant stone blocks of evil), but definitely thoroughly enjoyable.
@Sushi: It isn't Nightmare, but
.
As for the four Kirby system, cool but not necessarily the most helpful. Someties the Kirbys would go on a suicide mission and run off the edge of platforms, much to my choler and wasting of batteries.
Abilities: the reintroduction of Bomb, creation of Smash and the use of final weapon Master (I call it Galaxia) were excellent additions. (Magic isn't too good in this game, but I'll save my discussion during KSqSq)
Bosses: Good overall, though some minibosses were weird... Boxy and
the punching dog... thing Box Boxer - I only find him weird b.c. his eyes always were covered by his ear-fists. (though I never thought he had eyes...).